1. Carbon
2. Nitrogen
3. Potassium
4. Free energy
Free energy
1. producers
2. consumers
3. decomposers
4. All of the above
All of the above
1. Fallen leaves-bacteria-insect larvae
2. phytoplankton-zooplankton-fish
3. Grasses-fox-rabbit
4. Grasses-chameleon-insect-bird
phytoplankton-zooplankton-fish
1. overgrazing
2. selective grazing
3. farming
4. None of the above
overgrazing
1. BOD
2. Biological magnification
3. Eutrophication
4. Autopurification
Eutrophication
1. 15-25 cm
2. 25-30 cm
3. 50-75 cm
4. 75-100 cm
15-25 cm
1. 1%
2. 10%
3. 30%
4. 50%
10\%
1. Flow of energy
2. Cycling of materials
3. Both (1) and (2)
4. None of the above
Both (1) and (2)
1. scavenger
2. tertiary producers
3. tertiary consumers
4. secondary consumers
tertiary consumers
1. atmosphere
2. ocean
3. organisms
4. rocks
rocks